[ci] Update actions/setup-node action to v6

Author: lpinca

.github/workflows/ci.yml

@@ -48,7 +48,7 @@ jobs:
             os: windows-latest
     steps:
       - uses: actions/checkout@v5
-      - uses: actions/setup-node@v5
+      - uses: actions/setup-node@v6
         with:
           node-version: ${{ matrix.node }}
           architecture: ${{ matrix.arch }}